Agitator drive for power sprayers



Feb. 28, 1939: H. E BRANDT ET AL 2,149,112

AGITATOR DRIFVE FOR POWER SPRAYERS Filed May 25, 1936 H /0 m I I 'a M e M MA. a gg @153 jvyzz rafis fiE/YRYEB IIMD AZELAS'OFENSE/Y vftform] Patented Feb. 28, 1939 2,149,112

UNITED STATES PATENT OFFICE AGITATOR DRIVE FOR POWER SPRAYERS Henry E. Brandt and Axel Sorensen, North St.

Paul, Minn assignors to Dobbins Manufacturing Company, North St. Paul, Minn., a, corporation of Minnesota Application May 23, 1936, Serial No. 81,437 2 Claims. (01. 299-45) This invention relates to a spraying device and or propelled as desired on the wheels 1. A particularly to a portable power sprayer comprismotor 9' is mounted on the top 5a at one end ing a portable tank for containing the fluid to thereof, which motor is illustrated as of the inbe sprayed, a discharge pump, a motor for drivternal combustion type having one or more cyl- 5 ing said pump, an agitating means in said tank inders 9a and a fuel supply tank 9b. Said motor 5' and means for driving said agitating means from is equipped with a shaft carrying a driving pulley said pump. (not shown). A belt or chain l runs over said It is an object of this invention to provide a driving pulley and over a larger driven pulley or very simple and efiicient means for driving said wheel H a forming part of a pump H also A 10 agitator from said pump. mounted on top a. The pump H comprises a It is a further object of the invention to provide rotating horizontal shaft l lb carrying eccentrics such a portable power sprayer comprising a pump which are connected to plunger rods Hc conhaving a rotating member, an agitator in said nected to plungers in the pump cylinders lld. tank, a member secured to said agitator and ex- Said pump comprises a frame He having at its tending to a point adjacent said pump, an operupper portion the bearings Hf for shaft llb. The 15 ating member on said last mentioned member pump H has a discharge outlet Hg towhich is and means on said rotating member for engaging connected a flexible hose l2 which will be and actuating said operating member to operate equipped with a suitable spraying nozzle (not said agitator. shown).

It is more specifically an object of the inven- The receptacle 5 has disposed therein some 20 tion to provide a portable power sprayer comprisdistance above its bottom a rotatable agitator l3 ing a tank, a rotatable agitator in said tank, a and while this might take various forms, in the shaft secured to said agitator and extending to embodiment of the invention illustrated it is the exterior of said tank, a power operated pump shown as a propeller having a plurality of helical on said tank having a rotating wheel, a gear on blades and said propeller is preferably arranged 25 said shaft and means on said wheel meshing to direct the fluid downwardly toward the bottom with said gear to rotate the same and operate of the tank 5. A shaft I4 is connected to prosaid agitator. peller l3 and extends upwardly through the top These and other objects and advantages of the 5a, the same being journaled in a bearing Hh invention will be fully set forth in the following at the lower portion of frame He and in a 'bear- 3() description made in connection with the accoming Hz adjacent the top of frame He. A gear panying drawing, in which like reference char- I5 is secured to the upper end of shaft l4 and acters refer to similar parts throughout the sevengages the upper end of bearing Hi. Gear l5 eral views and in which: is disposed alongside and adjacent the pulley or 5 Fig. 1 .is a perspective view of a sprayer wheel Ha. Gear l5 has qiute a number of raequipped with the invention disclosed and claimed dially extending teeth and these teeth as seen herein; from the face of the gear are rounded or tapered Fig. 2 is a view in side elevation of a portion somewhat at their edges as shown in Fig. 2. The of a pump used; and wheel Ha is provided on its side adjacent gear 40 Fig. 3 is a vertical section taken on line 33 IS with a pair of cams llaa. Each of the cams 40 of Fig. 2 as indicated by the arrows. llaa is substantially semi-circular, having their Referring to the drawing, a portable power ends somewhat tapered as seen in side elevation sprayer is shown comprising a tank or receptacle and said cams in section are tooth-shaped as 5 adapted to contain the fluid or mixture to be shown in Fig. 3. With the wheel Ila rotating in 5 sprayed. While this tank might take various the direction indicated by the arrow in Fig. 2 it forms, in the embodiment of the invention illuswill be seen that each cam has an end which will trated it is shown as having a flat top 5a and a enter between the teeth of gear l5 and the end substantially semicylindrical body. Said tank opposite this entering end will be called the exit will be provided with a suitable removable 010- end. As shown in Fig. 2 the cams are progressure shown as a rectangular door 5b. This door sively a greater distance from the center of 50 can be removed for the purpose of filling the tank. wheel I la from their entering end to their exit The tank 5 is supported on trunnions 6 forming end. Said cams are thus eccentric to wheel Ha. axles for a pair of wheels 1. A handle 8 of rec- The cams Haa. are flared upwardly or made of tangular form is secured to one end of the regreater height as they approach the said exit ceptacle 5 by means of which it may be pushed end as shown in Fig. 3. 55

In operation when the sprayer has been brought to the desired location for spraying, motor 9 will be operated and pump II will be operated through the belt [0 which will rotate the driven pulley Ha which forms the driving means for the pump ll. Fluid will be forced by the pump from the tank 5 out through the outlet Hg and through the hose l2 and will be sprayed upon the desired trees or plants. As wheel Ila rotates the cams llaa will successively enter between the teeth of gear 15 and due to the eccentricity of said cams each one will rotate said gear the distance between two of its teeth. Said gear will thus be rotated the distance of two teeth for each rotation of wheel Ila. It will be seen that as gear l5 rotates the engaged teeth move away from the cam llaa. For this reason the cams were made somewhat higher at their exit ends so as to prolong the engagement of the same with the gear. As gear I5 is rotated and shaft l4 rotated the propeller I3 is operated at the desired speed and the fluid to be sprayed is kept properly agitated and mixed.

From the above description it is seen that applicant has provided a very simple, compact and efficient structure for operating the agitator in such a portable power spraying device. The mechanism is all kept closely together and the use of a belt and pair of pulleys for operating the agitator is not necessary. The structure is not only simple but one that is quite rugged and durable and needs no attention for keeping it in proper running order. The device has been amply demonstrated in actual practice, found to be very successful and efficient and is being commercially made.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicant's invention, which generally stated, consists in a device capable of carrying out the objects above set forth in the parts and combinations of parts disclosed and defined in the appended claims.

What is claimed is:-

1. The combination with aportable power sprayer comprising a portable tank for containing fluid to be sprayed, a motor mounted on said tank, a discharge means for said fluid, a pump operated by said motor for propelling fluid from said receptacle to said discharge means, said pump comprising a belt pulley, an auxiliary bearing on said pump, a shaft journaled in said auxiliary bearing and extending downwardly into said receptacle, an agitator secured to said shaft in said receptacle, a gear secured to the upper end of said shaft at one side of said pulley and cams on the side of said pulley meshing with said gear to rotate the same and operate said agitator.

2. A sprayer construction comprising a receptacle for fluid to be sprayed, a pump for discharging fiuid carried by said receptacle at the outer side thereof, said pump comprising a rotating member, a rotary agitator in said receptacle, an operating shaft carrying said agitator and extending upwardly to the outer side of said receptacle, a member secured to said shaft and engageable by said rotating member to rotate said shaft and operate said agitator, said first mentioned member having thereon a pair of substantially semi-circular cams and said second mentioned member constituting'a gear between the teeth of which said cams pass to rotate said gear and shaft, said cams being of increasing height toward and at the portions thereof which are last in engagement with said gear.

HENRY E. BRANDT. AXEL SORENSEN. 

